Feature: implied parentheses about hackett HOT 3 OPEN

I agree that this would be nice if it could be done perfectly, but it’s trickier in practice than it might seem. I do think it would be cool to have an opt-in ML-like reader that you could get with #lang hackett/ml or something like that. For prior art, check out the following SRFIs:

• SRFI 49: Indentation-sensitive syntax
• SRFI 110: Sweet-expressions — This one has an existing Racket implementation that works with arbitrary #langs that use the Racket reader, including (as of now) Hackett.
• SRFI 119: wisp

The fact that there are three different standards for this hints that this is a harder problem than it might seem. I would encourage you to study the different tradeoffs each of them makes to better understand what the challenges are.

from hackett.

As a personal perspective -- after a long time of doing Lisp, and then coming to Haskell, I have come to value its visual terseness.

It seems to increase the raw perception bandwidth.

from hackett.

While I agree that Haskell-like syntax may be easier on the eyes for some, I doubt that the individual perception bandwidth is increased all that much. And the parentheses are not only useful for macros but for editors' structural editing capabilities (which can be thought of as development-time [i.e., pre-compile time] key-bound macros).

from hackett.